ubifs: Implement ubifs_lpt_lookup using ubifs_pnode_lookup

ubifs_lpt_lookup() starts by looking up the nth pnode in the LPT. We
already have this functionality in ubifs_pnode_lookup(). Use this
function rather than open coding its functionality.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>

diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index ed0c67fe7500be37cba862b1f7c92f4159ca7e13..5f57af224b8f9aca7cb09f42dac51bb4d0fa8ec4 100644 (file)
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1480,27 +1480,11 @@ struct ubifs_pnode *ubifs_pnode_lookup(struct ubifs_info *c, int i)
  */
 struct ubifs_lprops *ubifs_lpt_lookup(struct ubifs_info *c, int lnum)
 {
-       int err, i, h, iip, shft;
-       struct ubifs_nnode *nnode;
+       int i, iip;
        struct ubifs_pnode *pnode;
 
-       if (!c->nroot) {
-               err = ubifs_read_nnode(c, NULL, 0);
-               if (err)
-                       return ERR_PTR(err);
-       }
-       nnode = c->nroot;
        i = lnum - c->main_first;
-       shft = c->lpt_hght * UBIFS_LPT_FANOUT_SHIFT;
-       for (h = 1; h < c->lpt_hght; h++) {
-               iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
-               shft -= UBIFS_LPT_FANOUT_SHIFT;
-               nnode = ubifs_get_nnode(c, nnode, iip);
-               if (IS_ERR(nnode))
-                       return ERR_CAST(nnode);
-       }
-       iip = ((i >> shft) & (UBIFS_LPT_FANOUT - 1));
-       pnode = ubifs_get_pnode(c, nnode, iip);
+       pnode = ubifs_pnode_lookup(c, i >> UBIFS_LPT_FANOUT_SHIFT);
        if (IS_ERR(pnode))
                return ERR_CAST(pnode);
        iip = (i & (UBIFS_LPT_FANOUT - 1));